Propeller



' 2 Sheets-Sheet 1 Inventor L 7 #Wmrfifwwa S. H. WASHBURNE PROPELLE'RFiled Feb. 28, 1933 ffinuM April 10,1934;

Ap 10, 1934- s. H. WASHBURNE PROPELLER Filed Feb. 28, 1933 2Sho'ets-Sheet 2 k5? l l amija r r z flllomey Patented Apr. 10, 1934UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to improved propellers for use with any kind offluid and for transporting the fluid or being actuated by the movingfluid itself.

The general object of the invention is to provide propelle means whichwill produce more pronounced agitation and grip of the propellers intothe media or fluid than propelling devices as now constructed and whichwill compound the suction and the delivery pressure, and can be made ofsmaller dimensions and will have greater strength and better efliciencythan propellers as now constructed.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which:-

Figure 1 is a front view of the invention.

Fig. 2 is a sectional view thereof.

Fig. 3 is an elevation.

Fig. 4 is a view partly in section showing a modification.

Fig. 5 is a. section on line 5-5 of Fig. 4.

In these drawings, a pair of propellers is shown but it is to beunderstood that any number of these propellers can be used.

As shown in the drawings, I provide a pair of propellers A and B, eachof which cons sts of a hub 1, blades 2 and a ring 3 to which the outerends of the blades are connected. A'hollow shaft 4 is connected to thehub of the propeller B and a shaft 5 is connected to the hub of thepropeller A, the shaft 5 passing through the hollow shaft 4 and the twopropellers are to be rotated in opposite direction. Fig. 2 shows a driveshaft 6 having a gear 7 thereon which meshes with a gear 8 on the hollowshaft 4 and a gear 9 on the shaft 5 so that the two propellers aredriven in opposite directions when the shaft 6 is rotated, but it is tobe understood that the shafts can be driven in any suitable manner.

A cylinder 10 surrounds the two propellers and -is supported by thebrackets 11-from gearing housing 12. This cylinder has its front endslightly curving inwardly as shown at 13 and its 'rear part slightlycontracted as shown at 14 so that the rear part of the cylinder is ofless internal 55 diameter than that part which encloses the twopropellers. The rear part of the cylinder is formed with the openings 15which slope inwardly and rearwardly and a scoop 16 covers the rear partof each opening.

The blades or wings of the propellers are positioned to force the mediaof fluid from front to rear and the rotation of the two propellers intwo directions prevents the media or fluid from performing a whirlingmotion around the axis of the device and the rings 3 prevent it frommoving 05 centrally outwardly which is the tendency of the mediaespecially when adjoining the terminals of the propellers. Cylinder 10acts to guide the fluid to the rear in a compact body and the smallerdiameter of the cylinder at the rear produces an internal pressureagainst the walls thereof which increases the push at the tail or rearend of the device. The fluid rushing through the openings 15 will unitewith the main stream of fluid passing through the device and thispassage of the fluid. through the openings is induced by the power ofsuction. The device can be used with either gas, air, or a liquid or apowdery substance.

In the modification shown in Figs. 4 and 5, inwardly and rearwardlyextending spout-like members 17 are connected to the openings 15 andthese members are preferably of the shape shown in Fig. 5. These memberswill carry the fluid from the outside towards the central part of thedevice and act to vivify the motion of the fluid which is nearly alwaysdeficient at this point.

- It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction andin the combination and arrangement of the several parts pro- I videdthat such changes fall within the scope of the appended claims.

Having thus described my invention, what I claim as new is:-

1. A' device of the class described comprising a pair of propellers eachconsisting of a hub. a number of blades and a ring connected to theouter ends of the blades, means for rotating the propellers in oppositedirections, a cylinder surrounding the propellers, said cylinder havingits rear portion of smaller internal diameter than that portion whichsurrounds the propellers, and said rear portion having inwardly andrearwardly extending openings therein, and scoops extending overtheex'terior rear portions of said openings.

2. A device of the'class described comprising 110 tending openingstherein, and the front end of the cylinder being slightly curvedinwardly.

3. A device of the class described comprising, a stationary cylinderhaving its ends open and having its rear portion of smaller internaldiameter than its front portion, said rear portion having inwardly andrearwardly extending openings therein, a number of propellers located inthe front portion and means for rotating said propellers in oppositedirections.

STEPHEN HOWARD WASHBURNE.

